Dock light arm



FIG. 1 is a front perspective view of a dock light arm showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a front perspective view thereof, showing the design in an alternate environment; and,

FIG. 10 is a front perspective view thereof, showing the design in yet another alternate environment.

The broken lines illustrate environmental structure and unclaimed portions of the dock light arm and form no part of the claimed design. 

CLAIM The ornamental design for a dock light arm, as shown and described. 